Fiberglass art products have an elastic modulus twice that of wood but ten times less than steel, so they often feel less rigid in product design and are prone to deformation. They can be made into thin shell structures or sandwich structures. Alternatively, they can be reinforced with high-modulus fibers or by adding reinforcing ribs. They are generally not suitable for continuous use at high temperatures; standard fiberglass sculptures lose strength significantly above 50°C, usually only used below 100°C; and general-purpose epoxy fiberglass sculptures see a significant drop in strength above 60°C. However, high-temperature-resistant resins can be selected to allow for continuous operation at temperatures between 200~300°C.